The Utah Highway Patrol said in a statement Monday that 13-year-old Summer Pinzon of Azusa was traveling on the bus with her mother when it crashed Sunday night off Interstate 70 west of Green River, Utah.

Passengers on a Greyhound bus that careened off a Utah highway on New Year’s Eve said in a desperate 911 call that the driver had passed out before the crash, according to a recording made public by authorities Thursday.

Police are investigating a possible negligent homicide case against a Greyhound bus driver who passengers said passed out before the bus careened off a road in the Utah desert, killing a teenage girl and injuring 12 more people, search warrants made public Wednesday show.